Bosch HSS-Co koboltti kierrepora 6 mm DIN 338 2609255074

Professional metalworkers and serious DIYers drilling stainless steel or cast iron rely on this Bosch HSS-Co twist drill bit for clean, accurate holes. The 6 mm diameter and 93 mm total length suit hand drills and drill presses alike.

Key specifications

• Drill bit diameter: 6 mm
• Total length: 93 mm
• Working length: 57 mm
• Material: HSS-Co (cobalt alloyed high-speed steel)
• Shank: Cylindrical
• Standard: DIN 338
• Point angle: 135°
• Point type: Split point (self-centring)
• Flute type: Spiral
• Manufacturing process: Ground from solid
• Surface finish: Bright / Bronze
• Packaging quantity: 1 piece

Why choose it

Cobalt alloying boosts heat resistance and hardness, so the bit stays sharp longer in tough materials. The 135° split point starts on contact without wandering, reducing the need for centre punching. Ground flutes clear chips efficiently for faster cutting.

Ideal use cases

• Drilling stainless steel, acid-resistant steel, and cast iron
• Precision holes in non-ferrous metals
• Use with rotary drills, cordless drills, or drill presses

Good to know

Use cutting oil or coolant to extend tool life. The cylindrical shank fits standard three-jaw chucks. One bit per pack.